Tool.



F. JOHNSON. TOOL APPLICATION FILED DEC. 22, 1913.

1, 1 1 3,788. Patented Oct. 13, 1914.

9%m m h FRANK JOHNSON, 0F GLENDALE, CALIFORNIA.

TOOL.

Specification of Letters Patent.

Patented Oct. 13, 1914.

Application filed December 22, 1913. Serial No. 808,119.

To all whom it may concern Be it known that I, FRANK JOHNSON, a citizenof the United States, residing at Glendale. in the county of LosAngeles, State of California, have invented new and useful Improvementsin Tools, of which the following is a specification;

Thisinvention relates to a tool, and particularly pertains to a tool forassisting in the insertion and removal of the intake and exhaust valvesof gas engines.

It is the object of this invention to pro vide a tool of the abovecharacter by means of which the valve springs of the ordinary intake andexhaust valves of gas engines may be compressed, so as to permit theready removal of the spring engaging pin from the valve stem tofacilitate the removal of the valve,- and which may also be employed inputting the valve in place.

A further object of the invention is to provide a valve spring lifter inwhich the lifting of the spring is elfect ed by leverage and which is soconstructed that the folcrum point of the lifter may be varied to suitchanging conditions.

Another object is to provide a device for compressing the valve springsby means of which the springs can be readily engaged and compressedwithout exerting strains on the valve stem so as to avoid bending of thelatter.

Another object is to provide an adjustable support for the toolcooperating with the tool in performing its functions, which support isadapted to be connected with various parts of the engine casing or otherrigid structure to suspend the tool.

The invention primarily resides in a shank having a slotted end portionon which a spring engaging disk is pivotally mount: ed, said disk beingslotted to receive the valve stem. and a flexible support adjustablyengagcablc with the slotted end of the shank. substantially asillustrated in the accompanying drawings,- in which:

Figure 1 a perspective view of the invention. Fig. is a detail sectionin elevation on the line 22 of Fig. 1. Fig. 3 is a section andelevation. on the line of Fig. 2. as seen in the direction of thearrows. Fig. 4 is a side elevation illustrating theapplication of theinvention.

in inserting and removing the ordinary intake and exhaust valves of gasengines, considerable dillieul'ty is met in providing an effective meansfor compressing the valve spring and retaining it in a compressed statewhile inserting the spring supporting pin in the stem, or removing ittherefrom. Such tools as have been provided for this purpose arefrequently objectionable'in that they tend to bend and in jure the valvestem thereby hindering the proper operation of the valve. This. andother objectionable features of tools of this class are overcome by thedevice shown in the drawings, wherein 5 indicates the shank or handleportion of the tool, which shank constitutes a lever and carries a valvespring engaging member and is designed to be fulcrumed at various pointsthroughout its length. The lever-shank is formed with a yoke 6 on itsouter end in which the spring engaging member is mounted, this membercomprising a disk 7 having a flange 8 pivotally connected at 9 to theyoke 6, so as to permit of a rocking or swinging movement of the disk inrelation to the shank. The flange 8 extends approximately half Wayaround the periphery of the disk 7 and proj ectsupward from its rearedge.

Formed in the disk 7 and in alinement 'with the shank 5 is an open-endedslot 10,

which intersects a central opening 11 in the disk. This slot 10 isprovided for the purpose of permitting the disk 7 being inserted beneaththe washer 12, and alongside the spring engaging pin 13 on the valvestem 1 so as to 1 .vsition the washer 12 on the upper face of the disk 7with the valve stem extending centrally-of the disk 7 through theopening 11.

Formed in the shank 5 at the base of the yoke 6 is a longitudinallextending slot 15 which is open at its outer end to permit the insertionin the slot of the links of a chain 16, which links are constructed witha narrow lower portion 17 of width than the slot 15 and an enlargedupper portion 18 of greater width than the slot. so that when a link isinserted edgewisc in the slot the upper end of the link immediatelytherebeneath will engage the underside of the shank 5 on opposite sidesof the slot as shown in Fig. 3 and extend into opposite grooves ornotches 19 on the underside of the shank to form 'a fulcrum for theshank as will be later described. A. series of the notches 19 isprovided throughout the length of the slot 15 to permit of adjustmentofthe folcrum to different points. The chain 16 is cated in dotted linesin y stem, so that a nearly direct rigid portion of the engine casing20and is provided with a hook 21 or other suitable device for thatpurpose. i

In the operation of the invention when it is desired to remove a valvethe chain 16 is suspended from a rigid portion of the engine casing 20by means of the hook 21 or otherwise, at a point adjacent the valve stem14 and in such position as to parallel the latter. The shank 5 ispositioned on the chain with opposite notches 19 in engagement with alink thereof at a point slightly above the Washer 12, the link inopposite notches 19 at a point on the shank, according to the distancethe chain is spaced from the valve stem and according to the leveragedesired. It is desirable that the chain extend parallel with the valveupward move ment of the inner end of the tool will be efi'ected when theshank is rocked. The disk designed to be secured to a 7 isv then placedbelow the washer 12 as shown in Fig. 4. The Washer 12 will then bearranged above the disk 7 and Will abut against the flange 8 whichflange will operate to engage the edge of the Washer and thereby dfpbsethe disk 7 so that the valve stem 14 'w" ll extend centrally of theopening 11 clear of the margin thereof. By manually depressing the outerend of the shank 15 to rock the latter into the position indi- Fig. 4,the disk 7 Will be elevated so as to raise the washer l2 and cause thespring 23 bearing between the washer 12 and the engine casing 20 to becompressed. The pin 13 can then be readily withdrawn, after which thespring 23 may be gradually relaxed and removed, if desired.

being engaged.

mg seat or disk 7, the latter will maintain a horizontal position duringthe arcual.

movement of the yoked end of the shank, so as to not distort the springand thereby form a substantial support for-the latter during the removal'or replacement of the valve stem and pin. 4

It willlbe seen that thetool can be employed in inserting the valve, thevalve stem 14 and spring 23 in position and then applying the tool tocompress the spring whereon the pin 13 can put in moved.

hat I claim is:

A valve spring lifter,

comprising a lever memberformed with a yoke and having an open-endedlongitudinally extending slot therein and formed with a plurality ofnotches on its underside arranged throughout the length of the slot, aspring engaging seat pivoted in the yoke and a chain extending throughthe slot and have any of its links engaged in the notches I By pivotallymounting the spring engagby placing :1 duptcd t0 befrea dilay place, andthe tool'afteru' a'rd re to' on the lever-member to form a fulcrum forthe latter. In Witness that I claim the foregoing-I have hereuntosubscribed-my name this 10th da" of December 1913.

FRANK JOHNSON. flVitnesses EDMUND A. .STRAUSE, MARIE BATTEY.

